/*
 * Copyright 2007-2008 Sun Microsystems, Inc.  All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.sun.swingset3.utilities;

import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Graphics2D;
import java.awt.GraphicsEnvironment;
import java.awt.Transparency;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.net.URL;
import javax.jnlp.ServiceManager;
import javax.swing.SwingConstants;

/**
 * 
 * @author aim
 */
public class Utilities {

	private Utilities() {
		// never instantiate
	}

	public static boolean runningFromWebStart() {
		return ServiceManager.getServiceNames() != null;
	}

	public static String getURLFileName(URL url) {
		String path = url.getPath();
		return path.substring(path.lastIndexOf("/") + 1);
	}

	private static BufferedImage createCompatibleImage(int width, int height) {

		return GraphicsEnvironment.getLocalGraphicsEnvironment()
				.getDefaultScreenDevice().getDefaultConfiguration()
				.createCompatibleImage(width, height);

	}

	public static BufferedImage createTranslucentImage(int width, int height) {

		return GraphicsEnvironment.getLocalGraphicsEnvironment()
				.getDefaultScreenDevice().getDefaultConfiguration()
				.createCompatibleImage(width, height, Transparency.TRANSLUCENT);

	}

	public static BufferedImage createGradientImage(int width, int height,
			Color gradient1, Color gradient2) {

		BufferedImage gradientImage = createCompatibleImage(width, height);
		GradientPaint gradient = new GradientPaint(0, 0, gradient1, 0, height,
				gradient2, false);
		Graphics2D g2 = (Graphics2D) gradientImage.getGraphics();
		g2.setPaint(gradient);
		g2.fillRect(0, 0, width, height);
		g2.dispose();

		return gradientImage;
	}

	public static BufferedImage createGradientMask(int width, int height,
			int orientation) {
		// algorithm derived from Romain Guy's blog
		BufferedImage gradient = new BufferedImage(width, height,
				BufferedImage.TYPE_INT_ARGB);
		Graphics2D g = gradient.createGraphics();
		GradientPaint paint = new GradientPaint(0.0f, 0.0f, new Color(1.0f,
				1.0f, 1.0f, 1.0f),
				orientation == SwingConstants.HORIZONTAL ? width : 0.0f,
				orientation == SwingConstants.VERTICAL ? height : 0.0f,
				new Color(1.0f, 1.0f, 1.0f, 0.0f));
		g.setPaint(paint);
		g.fill(new Rectangle2D.Double(0, 0, width, height));

		g.dispose();
		gradient.flush();

		return gradient;
	}

	public static Color deriveColorAlpha(Color base, int alpha) {
		return new Color(base.getRed(), base.getGreen(), base.getBlue(), alpha);
	}

	/**
	 * Derives a color by adding the specified offsets to the base color's hue,
	 * saturation, and brightness values. The resulting hue, saturation, and
	 * brightness values will be contrained to be between 0 and 1.
	 * 
	 * @param base
	 *            the color to which the HSV offsets will be added
	 * @param dH
	 *            the offset for hue
	 * @param dS
	 *            the offset for saturation
	 * @param dB
	 *            the offset for brightness
	 * @return Color with modified HSV values
	 */
	public static Color deriveColorHSB(Color base, float dH, float dS, float dB) {
		float hsb[] = Color.RGBtoHSB(base.getRed(), base.getGreen(), base
				.getBlue(), null);

		hsb[0] += dH;
		hsb[1] += dS;
		hsb[2] += dB;
		return Color.getHSBColor(hsb[0] < 0 ? 0 : (hsb[0] > 1 ? 1 : hsb[0]),
				hsb[1] < 0 ? 0 : (hsb[1] > 1 ? 1 : hsb[1]), hsb[2] < 0 ? 0
						: (hsb[2] > 1 ? 1 : hsb[2]));

	}

	public static String getHTMLColorString(Color color) {
		String red = Integer.toHexString(color.getRed());
		String green = Integer.toHexString(color.getGreen());
		String blue = Integer.toHexString(color.getBlue());

		return "#" + (red.length() == 1 ? "0" + red : red)
				+ (green.length() == 1 ? "0" + green : green)
				+ (blue.length() == 1 ? "0" + blue : blue);
	}

	public static void printColor(String key, Color color) {
		float hsb[] = Color.RGBtoHSB(color.getRed(), color.getGreen(), color
				.getBlue(), null);
		System.out.println(key + ": RGB=" + color.getRed() + ","
				+ color.getGreen() + "," + color.getBlue() + "  " + "HSB="
				+ String.format("%.0f%n", hsb[0] * 360) + ","
				+ String.format("%.3f%n", hsb[1]) + ","
				+ String.format("%.3f%n", hsb[2]));
	}
}
